M.a. Ford. 20519900 Screw Machine Drill Bit 0.199 in

Product Description

The M.A. FORD. 20519900 is a screw machine length solid carbide drill bit designed for precision hole-making in demanding materials. It measures 0.199 inches in diameter (wire size #8) with an overall length of 2.25 inches, making it a compact stub-length tool suited for rigid setups and close-clearance drilling. The 135-degree split point with web thinning reduces thrust and improves centering without a separate spotting operation. Two spiral flutes in a slow-spiral configuration evacuate chips effectively while maintaining wall support in the cut. This bit is intended for use by machinists, tool and die technicians, and maintenance professionals working with production drilling applications.

This drill bit is rated for use in cast iron, non-ferrous metals, stainless steel, and steel. The screw machine length format - shorter than a jobber bit - provides added rigidity, which reduces deflection when drilling tough or abrasive workpiece materials. It fits standard drill chucks accepting a 0.199-inch straight-cylindrical shank. The 3xD flute-to-diameter ratio and single-margin geometry are well matched to CNC machining centers, drill presses, and turret lathes running moderate to high feed rates in production environments.

Key Features

• Solid carbide construction for extended tool life in abrasive and hard materials
• 135-degree drill point angle with web thinning for self-centering entry and reduced thrust
• Slow-spiral flute geometry optimized for chip control in cast iron and stainless steel
• Screw machine (stub) length at 2.25 inches overall provides maximum rigidity and minimizes deflection
• Bright/uncoated finish compatible with a wide range of cutting fluids and coolant strategies
• Diameter tolerance held to +0.0000 to -0.0005 inches for close-tolerance hole requirements

Compatibility

Designed for use in cast iron, non-ferrous metal, stainless steel, and steel workpieces. Fits any drill chuck or collet accepting a 0.199-inch straight-cylindrical shank. Belongs to M.A. FORD. Series 205, covering the 0.1500 to 0.2000 inch diameter range.

Installation Notes

This drill bit is installed by machinists and tooling technicians in machine tool spindles, CNC machining centers, drill presses, or turret lathes. Secure the shank fully in the chuck or collet before operation and verify runout does not exceed the diameter tolerance band. Solid carbide tooling is brittle - avoid side loading, interrupted cuts without appropriate feed reduction, or dropping the bit on hard surfaces. Use appropriate cutting fluid or coolant for the workpiece material to maximize tool life and hole quality.